Pipe-gripping device



A. JARMOLOWSKY PIPE GRIPPING DEVICE 2 Sheets-Sheet 1 Original Filed Sept. 10. 1921 y Rt mw Wm mm M WW m M J M/ W W fl A r-i129, 192

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7 Original Filepl Sept. 10. 1921 2 Sheets-Shes I flBBw-MM q/HEMOLOWSE/ BY M x ATTORNEY-3 WITNESSES Patented Apr. 22, 1924.

UNTTED STATES PATENT OFFICE.

. ABRAHAM JARMOLOWSKY, OFBROOKLYN, NEW YORK.

PIPE-GRIPPING :onvien.

Application filed September 10, 1921, Serial No. 499,677. Renewed October 1, 1923.

To aZZ whom it may concem Be it known that I, ABRAHAM J ARMOLOW- SKY, a citizen of the United States, and a resident of Brooklyn, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Pipe-Gripping Device, of which the following is a full, clear, and exact description.

This invention relates to a pipe gripping device and has for an object the provision of a device whereby pipes of many sizes can be gripped by simple and quick manipulation of the tool.

A further object resides in the provision of means whereby by the substitution of a simple part, the range of usefulness of the tool is considerably increased.

A further object resides in the provision of simple means whereby the length of move- 'ment of the operating parts can be very accurately adjusted.

A still further object resides in the provision of means whereby the entire tool is 'very readily assembled and disassembled.

A still further object of the invention re-' sides in the particular construction and arrangement of parts hereinafter described and claimed and shown in the accompanying drawings.

This invention is illustrated in the drawings of which a Figure 1 is a longitudinal, vertical section taken through the tool showing the parts in their advanced position. 7

Figure 2 is a similar section showing the parts in their retracted position.

Figure 3 is a section taken on the line 33 of Figure 1.

Figure 4 is a transverse section taken on the line 4-4 of Figure 1.

Figure 5 is a transverse section taken on the line 55 of Figure 1.

Figure 6 is a vertical, longitudinal section taken through a modified form of tool.

Figure 7 is a vertical, longitudinal section taken through a still further modified form of tool.

The invention in general resides in the provision of a tool, constructed to enable a workman very easily and quickly to grip all sizes of pipes. The tool is provided with a particularly quick acting operating mechanism whereby the engagement of the tool with and the disengagement of the tool from the workpiece or pipe is very quickly effected. Various modified forms of this quick acting extends.

operating mechanism are shown. By simply operation of this tool is extended to very small pipes. The attachment of this extra part can be made in a very simple manner.

As shown particularly in Figures 1 to 5 inclusive, the tool comprises a shell 1, within which a plug 2 is adapted to slide. This plug is providedwith a rear slot 3 in' which, on a pin 4, a link 5 is pivoted. The other end of the link 5 is pivoted on a pin 6" to a second link 7. This link 7 at its other end is pivoted on a pin 8 to a threaded shaft 9. The shaft 9 is threaded within .a plug-10, provided with an exteriorly threaded portion 11 adapted to be received within an interiorly threaded portion 12 disposed in one end of the shell 1. Theouter end of the plug 10 is shaped in the form of a nut 13 whereby it may be manipulated by a wrench. The handle portion 14 is connected to the link 7 adjacent the pin 6 and the operation of this handle moves the links 5 and 7 as a sort of toggle joint to reciprocate the plug 2 within the shell 1. By threading the plug 10 further into or out of the .shell the position of the toggle and a variation of the travel of plug 2 can be efiected.

The plug 2 is provided with a threaded bore 15 into which a threaded stub shaft 16 This stub shaft extends from a plug portion 17 adapted to be disposed within the shell when adjacent the plug 2. The forward portion of this plug 17 is provided with an annular groove 18 into which flanged portions such as 19 and a plurality of fingers such as 20 are disposed. These fingers act as chuck members to grip the pipe. A spring such as 21 is disposed between the body portion of the plug 17 and the inner face of each finger 20 to normally tend to force it outwardly. There are a plurality of these fingers 20 disposed around the face of the plug portion 17.

The'end face of the shell is provided with a plurality of slots such as 22 disposed around its periphery.' Similarly, the end portion of the plug 17, which I will designate by the numeral 28, is provided with a plurality of longitudinally extending slots 24 in which the body portions of the fingers 20 are adapted to lie. After the plug 17 has been screwed into the plug 2, before which operation the fingers 20 have been placed on the end of the plug 17, a key plate such as 25 is disposed in one of the slots 22, and

adapted to engage with a lockingslot such as 26 to prevent the angular motion of the plug 17 after it has once been engaged with the plug 2. 7

At the outer face of the shell 1, I place a tapered sleeve 27. The inner surfaceof this sleeve is adapted to control the expansion and contraction of the ends of the fingers 20 whereby they will be adapted to receive larger or smaller pipe sections, such--as 28. The outer face of the plug 17 is provided with a threaded bore 29 in which a threaded shaft 30 extends. This threaded shaft is providedon its outer end with an enlarged head portion 31 against which the end of the pipe section 28 is adapted to bear to limit the distance to which the pipe section 28 is inserted'within the gripping device.

The inner end of the tapered sleeve 27 is provided with a flange 32. This flange is adapted to be engaged by a fiange 33 on a collar 34. The inner end is threaded as at 35 to engage with a similar threaded end surface 36 on the shell. By securing the collar 34 on to the end. portion 36, the sleeve 27 is held in place.

It will be observed that the extreme end portion of the plug 17, designated by the numeral 37 is cut out to permit of the disposal of the shaft 30 and head 31 therein.

In the operation of this form of my invention the toggle handle 14 causes the reciprocation of the plug 2 with the plug. 17 very simply and quickly, whereby the fingers 20, by reason of the engagement of their ends with the inner tapered surface,

of the sleeve 27 and action of springs 21 adjust themselves to receive different sizes of pipes. By regulating the position of the head 31, the, pipe 28 can be inserted more or less into the end of the tool. By adjusting the nut 13 the normal position of the toggle and the plugs can be determined. It will be noted, however, that this form of tool is adapted only to grip pipes on the outer surface thereof, and is especially adapted for exceedingly small sizes of pipes.

In Figures 6 and 7 I show modifications of my invention wherein pipes of larger sizes are adapted to be gripped. These pipes are preferably gripped by engagement of the tool with the inner surface thereof. In the modification shown in Figure 6, a handle 38 extending through a slot 3-9 in the shell 40 moves a pinion 41 meshing with a rack 42 connected to apl-ug 43. This plug 43 is provided with a threaded bore 44 into which a shaft 45 is threaded. This shaft connects with another plug 46. This plug is provided with tapered grooves such as 47 therein longitudinally disposed along its front portion. A series of fingers 48 are adapted to lie in the grooves 47 and have flanged portions 49 on their inner ends disposed within an annular chamber 50 of a collar 51, the collar provided with an inwardly extending flange 52 bearing against the outer edges of the flange 49. The other end of the collar is: threaded on to the shell 40. The depth of the annular groove 50 is considerably greater than the height of the flanges 49-, so that as the lever 38 is moved advancing the plug 46, the tapered grooves 47 of this plug will force the fingers 48 outward with respect to the axis of the plug, although the collar 51 will prevent the longitudinal movement of the fingers 48. Therefore, in the operation of this device, if the plug 46 is withdrawn the diameter between the surface of opposite fingers is reduced, whereas if the plug is advanced the diameter is increased.

By inserting the tool within the end of the pipe with the fingers drawn in, they may be then expanded to grip the end of the pipe. In other words, the plug 46 is adapted to move longitudinally ofthe shell 40, Whereas the fingers 48 move relatively radially.

In Figure 7 the plug portion 53 is provided with a plurality of grooves in which fingers 54 lie. These fingers are provided with a plurality of stepped surfaces such as 55 corresponding to similar stepped surfaces such as 56 on the plug. The inner surfaces of the grooves in the plug 53 are tapered, although the stepped surfaces 55 and 56 are disposed parallel to the axis of the plug. A collar 57 is threadedon to a threaded portion 58 of the plug and confines a rotatable member 59 between itself and a fixed flange 60 disposed on the other side of the member 59. This member 59 is provided with an operating handle 61. On the inner face of the operating collar or ring 59 spirally disposed ribs such as 62 are formed which are adapted to engage with correspondingly disposed grooves 63 on the rear end of the fingers 54. By rotating the handle 61 in one direction or another, it will be observed that the fingers 54 are advanced or retracted. As they are advanced they move down the tapered bottom of the grooves in the plug to reduce the distance between surfaces of opposite fingers, wherebya pipe held therein is released. By moving the fingers in opposite direction, the above mentioned distance is increased, whereby the interior surface of a pipe may be gripped.

In order to change the tool from the form shown in Figures 1.. to 5 to the type shown in Figure 6, it is merely necessary to unscrew the collar 34, remove the sleeve 27 and then unscrew the plug 17, whereupon a plug such as 46 can be screwed into the plug 2, the collar 51 being the same as the collar 34.

It will thus be seen that I have provided a simple, strong and quick acting pipe gripping device which is adapted for operation in connection With substantially all sizes of pipe.

What I claim is:

A pipe gripping device which comprises a shell, a reciprocating plug therein and having an annular groove, longitudinally disposed tapered grooves extending forwardly from said annular groove, fingers disposed in the longitudinal grooves, flanged portions on the fingers disposed in the annular groove, resilient means beneath each finger adapted to expand it, a tapered sleeve disposed against the end of the shell and the inner tapered surface of which restricts the expansion of the ends of the fingers, said tapered sleeve having a flanged portion thereon, a collar having a flanged portion contacting with the flanged portion on the tapered sleeve, said collar being adjustably fastened to the end of the shell and means for moving the plug backward and forward to permit of expansion and contraction of the fingers whereby they may be released and gripped.

ABRAHAM J ARMOLOWSKY. 

